Cam-Gear Linear Drive Layout for Compact Cooling Performance
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Solution Overview
Problem
Existing linear drive apparatuses in motor vehicle driving force assemblies are not compact, have a large volume, are heavy, and suffer from poor heat dissipation, which affects their efficiency and emissions control.
Innovation Solution
A linear drive apparatus with a cam gear transmission system, a compact design featuring a cam gear with weight-saving holes, a non-contact sensor, and a cooling water path surrounding the linear motion assembly, along with a return spring and limiting pin for mechanical stoppage, to reduce weight and enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional transmission gears are used in linear drive apparatus, then the apparatus can achieve reliable power transmission, but the overall volume and weight of the apparatus become relatively large
Solution Approach 1:
The cam gear is integrated into the housing structure, with the cam groove part forming a nested configuration where the bearing moves along the cam groove within the housing space. This nesting approach allows the transmission mechanism to be embedded within the existing structural envelope, reducing overall apparatus volume while maintaining power transmission functionality.
Solution Approach 2:
The cam gear combines multiple functions into a single component: the cam gear part provides power transmission through meshing teeth, while the cam groove part simultaneously guides the bearing and converts rotational motion to linear motion. This merging of transmission and motion conversion functions into one integrated component reduces the number of separate parts and compactes the overall structure.
2Reliability
If traditional transmission gears are used in linear drive apparatus, then the apparatus can achieve reliable power transmission, but the weight of the apparatus becomes relatively heavy
Solution Approach 1:
The cam gear is nested within the housing structure, utilizing the housing space for the transmission mechanism. This nesting reduces the need for additional supporting structures and minimizes the overall material required, thereby reducing weight while maintaining structural integrity and power transmission reliability.
Solution Approach 2:
The integration of the cam gear part and cam groove part into a single transmission gear component reduces the total number of parts that need to be manufactured and assembled. This merging reduces the cumulative weight of multiple separate components while maintaining the necessary power transmission function through the combined structural design.
3Volume of moving object
If compact design is implemented to reduce volume, then the apparatus size is reduced, but heat dissipation effectiveness deteriorates
Solution Approach 1:
The cooling water path is designed to surround the linear motion assembly in a three-dimensional configuration, with water channels arranged in multiple directions and planes. This multi-dimensional cooling approach maximizes the heat exchange surface area within the compact housing volume, allowing effective heat dissipation without increasing the overall apparatus size.
Solution Approach 2:
The cooling water path is segmented into multiple channels and passages that are distributed around the linear motion assembly. This segmentation allows cooling water to flow through multiple separate paths, increasing the total heat exchange area and improving heat dissipation effectiveness within the limited space of the compact housing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a compact, lightweight, and efficient linear drive apparatus with improved heat dissipation, enhancing air intake efficiency and reducing emissions.
Implementation Method 1
a cooling water path which surrounds the linear motion assembly
Implementation Method 2
a cooling water path which surrounds the linear motion assembly
Implementation Method 3
the bearing is located in the cam groove part, so as to convert rotational motion of the cam gear to linear motion of the linear motion assembly
Implementation Method 4
the sensor is a non-contact sensor
Data Source
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AI summary
The present device relates to a linear drive apparatus comprising the following structure: a housing (1); and, located inside the housing (1): an electric motor (2), a transmission gear (3) which meshes with an output gear on an output shaft of the electric motor (2), and a gear shaft (4) and a linear motion assembly (5); the transmission gear (3) is mounted on the gear shaft (4), the linear motion assembly (5) is mounted in such a way as to cooperate with the transmission gear (3), and converts rotational motion of the transmission gear (3) to linear motion; wherein an axis of the linear motion assembly is arranged in the same plane as an axis of the electric motor output shaft and an axis of the gear shaft. The linear drive apparatus provided by the present device has the advantages of a compact structure, small volume, light weight and good heat dissipation effect.